Police in Cardiff released footage of a bust in the Welsh capital this week.
In the video it took officers just 20 seconds to take apart the door using the chainsaw before they entered the house.
South Wales Police have swapped battering rams for chainsaws in recent months to speed up the process of breaking down doors.
After the raid South Wales Police tweeted on Wednesday, 'Another successful entry with the rescue saw in the fight against crime in Cardiff.'
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